Any way to download maps rendered by cycles nodes?
Maybe I'm not understanding your question, but in general you can bake whatever kind of map you want by feeding the attribute into a color input.  Using an emission shader and baking the emission makes things easy.  Uh, I think as with @Danyl Bekhoucha's answer here you should multiply the gamma by 2.2 so that the color is treated as non-color data when it is displayed (i.e. blender is going to gamma-correct it, so you need to un-gamma correct it manually).  Apologies in advance if I've gotten that confused somehow.



You may wish to edit your gradients with a color ramp or whatever, it's all configurable and depends on how you plan to use the data.